TITLE: 04/29 Eve Shift: 23:00-07:00 UTC (16:00-00:00 PST), all times posted in UTC
STATE of H1: Observing at 150Mpc
OUTGOING OPERATOR: Ryan S
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 17mph Gusts, 13mph 5min avg
    Primary useism: 0.03 μm/s
    Secondary useism: 0.17 μm/s
QUICK SUMMARY:
H1 is Locked for 22 hours and is currently Observing. The Plan is to continue this lock throught the night.
 

TITLE: 04/29 Day Shift: 15:00-23:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Observing at 146Mpc
INCOMING OPERATOR: Tony
SHIFT SUMMARY: Mostly quiet observing day today with just one brief break for some measurements. H1 remained locked the whole shift; current stretch is just over 22 hours.

• 21:19 - Dropped observing for commissioning measurements
  • In/out of NLN_CAL_MEAS twice during this time
• 21:58 - Resumed observing

LOG:

I reran the A2L script today during our small on the hop commissioning window.

The new gains have been entered in the guardian via the a2l_gains dictionary in userapps/isc/h1/guardian/lscparams.py

'FINAL':{
            'P2L':{'ITMX':-0.9646, #+1.0,
                   'ITMY':-0.4071, #+1.0,
                   'ETMX':3.2767,
                   'ETMY':4.8886}, #+1.0},
            'Y2L':{'ITMX':2.7253, #+1.0,
                   'ITMY':-2.0093, #+1.0,
                   'ETMX':4.7658,
                   'ETMY':0.9094 },#+1.0},# Centered on the optic #removed offsets from EY IX IY 220705 gm jd ec
                    }#spots that are the center of the optic
            }#close a2l gains dict

and accepted in SDF in OBSERVE.snap, see attached images.

[Jennie, Sheila, Gabriele]

We retuned the SRCL FF, by doing the usual injections. While fitting, we just tried to change the gain of the filter that was running a bit, and that was enough to get an improved subtraction. The new filter module (FM2) is active and in guardian.

H1 dropping observing as of 21:19 UTC for ~30 minutes for quick feedforward measurements.

Jennie W, Annamaria, Sheila

Annamaria suggested we check ASC-POP_A and B trends during the time we got a drop in optical gain before last maintenance Tuesday, as a result of which we had to change our SR2 and SR3 alignment.
We don't see a large change in the sums or the pitch and yaw over the drop in range and optical gain between 18:33:47 UTC on the 22nd and 12:3803 UTC on the 23rd.

From the plot it can be seen that the optical gain dropped by about 5% over this period.

The range dropped by ~10 Mpc.

ASC_POP_B_SUM dropped by 0.1%.

ASC_POP_B_PIT dropped by 0.08%.

ASC_POP_B_YAW dropped by 4.9%.

ASC_POP_A_NSUM dropped by 0.06%.

ASC_POP_A_PIT dropped by 1.3%.

ASC_POP_A_YAW dropped by 0.7%.

Looking at the zoomed out version is seems these are within normal drifts in previous locks.

State of H1: Observing at 146Mpc

Quiet morning of observing, wind picked up slightly over the past few hours. H1 has now been locked for over 18 hours.

Full report available here.

Summary:

• Daily observing duty cycle: 66.7%, 32.1%, 61.5%, 57.7%, 70.6%, 82%, 75.1%. Week average: 63.7%
• Range typically hovered between 150-160 Mpc, occasionally pushing a few Mpc above 160
  • Thursday Apr 18 saw abnormally low sensitivity in the middle of the day, unclear why it happened but was fixed after switching FD squeezing off/on
• Occasional high winds throughout the week which depressed sensitivity or led to lock-losses/difficulty re-locking. Microseism mostly calm throughout week
• Nearby earthquake on UTC April 20 did not cause lock-loss
• On Sunday noticed increased rate of glitches near 4 kHz, difficult to spot in a spectrogram
  • Generated omegscans which show that the glitch time/frequency structure does not extend down to lower frequencies
• Saw high-frequency broadband noise on some days lasting about 1 hr after the start of each lock segment, intermittent noise at ~33 Hz potentially related to ground vibrations in CS
• Several summary page (range, strain) plots on Friday Apr 19 are blank after 6:30 UTC due to frame issues

Mon Apr 29 10:08:54 2024 INFO: Fill completed in 8min 51secs

Gerardo confirmed a good fill curbside.

TJ, Ryan S.

We've been occasionally seeing some SDF differences come up after relocking related to the ALS Y REFL servo (most recently in alog77478), where the input gain and compensation boosts are being turned off during SHUTTER_ALS. After not finding any Guardian that does this, we decided it must be Beckhoff-controlled, but still wanted to understand why this only happens during some lock acquisitions and not others. When doing some trending, we saw that the gain and compensation boosts are turned on when the arm cavity is locked and turned off again when unlocked, but not turned off when shuttered (everything gets cleaned up after a lockloss). In some cases, after switching actuation from ALS WFS to DHARD, the green arm alignment drifts to the point where an arm (usually Y) unlocks and the input gain and compensation boosts are turned off before ALS is shuttered. As seen in the attachment, there's a ~5 second gap between when the arm nodes move to their SHUTTERED states and the light is actually shuttered, which we tracked down to a 6 second wait time in ISC_LOCK and believe is a remnant of old code. This wait time has been lowered from 6 seconds down to 1 second as there's really no reason to wait here anymore.

SDFs are correctly set and ISC_LOCK.py changes have been committed to svn, but the node will need to be loaded when next out of observing.

FAMIS 20026

Transmission through the PMC is continuing to get worse, so I'll see about trying to touch up the alignment just using the pico mirrors during maintenance. However, this may be indicative of a larger alignment issue through the amps, which would require much more invasive on-table alignment, which we would need to tackle at a later date with more time.

TITLE: 04/29 Day Shift: 15:00-23:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Observing at 148Mpc
OUTGOING OPERATOR: Ryan C
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 14mph Gusts, 10mph 5min avg
    Primary useism: 0.02 μm/s
    Secondary useism: 0.15 μm/s
QUICK SUMMARY: H1 has been locked for 14 hours. Range has had some brief drops overnight, but is still generally hanging around 150Mpc.

• Wind and microseism are low
• All other systems nominal

TITLE: 04/29 Eve Shift: 23:00-07:00 UTC (16:00-00:00 PST), all times posted in UTC
STATE of H1: Observing at 150Mpc
INCOMING OPERATOR: Ryan C
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 7mph Gusts, 5mph 5min avg
    Primary useism: 0.02 μm/s
    Secondary useism: 0.15 μm/s
QUICK SUMMARY:
H1 locked for 6 + hours and Observing.
Robert has removed his cable going across the road and the road cones.
SuperEvent candidate 240429an
And the Wind has died down over the last 4 hours.

After an Initial Alignment,H1 got back to Nominal_Low_Noise at 00:47 UTC .
Waited for the ADS Cameras, and realized that there are 2 new SDFs that needed accepting.
This must have been an automated change. Mr. Short also said that he had to Accept these Diffs.

H1 Is now in Observing.

On Friday I shut down the main HVAC (15:48 Apr 26 UTC  - 16:08) to evaluate coupling. The range was under 160 Mpc, so this will have to be redone after we regain range, in order to fully evaluate the effect of the improvements made over the break. The range did increase by a couple of Mpc, but Figure 1 shows this was due to jitter coupling in the 100-200 region, not input arm scattering at lower frequencies.

Figure 1 also shows that there are other drivers of jitter coupling below 100 Hz and above 200 Hz. I used a mobile accelerometer to search for the source of jitter in the 25-40 Hz band, and found that the dominant source was the Warehouse HVAC (see Figure 2). I think that the HVAC may be shorted to the building.

TITLE: 04/28 Eve Shift: 23:00-07:00 UTC (16:00-00:00 PST), all times posted in UTC
STATE of H1: Lock Acquisition
OUTGOING OPERATOR: Ryan S
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 28mph Gusts, 15mph 5min avg
    Primary useism: 0.04 μm/s
    Secondary useism: 0.18 μm/s
QUICK SUMMARY:
Lockloss a 22:58 UTC with unkown cause right after SuperEvent S240428DR and during the Stand Down Time.
Screen Shots of the Lockloss tools NDSCOPEs attached.

---Relocking---
Started relocking immediately without an Initial Alignment.
Increase flashes ran on both arms.
Lockloss at ENGAGE_DRMI_ASC
Will try again with out IA, and if that fails then I will do an IA.

Also Robert Still has Cones up on the road along Y arm to protect his cable that he has run across the street. Please be aware of this cable and try not to drive down the Y arm with out addressing this cable going across the street.

 

TITLE: 04/28 Day Shift: 15:00-23:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Lock Acquisition
INCOMING OPERATOR: Tony
SHIFT SUMMARY: Two locklosses this shift (one as I type this), observing for the rest of the time. Since relocking this afternoon, DARM in high frequency didn't look as good and range was slightly lower.

• 16:50 - Lockloss (alog77471)
• 17:20 - Restarting Picket Fence (alog77473)
• 18:14 - Reached NLN, automated relock
• 18:22 - Started observing
• 22:54 - S240428dr
• 15:58 - Lockloss

LOG:

Another picket fence issue at 03:37 UTC, I think the third in the past few weeks. I restarted the process on nuc5.